Abstract: A method of exciting nuclear spins in a body, the method comprising the steps of: (a) immerging said body (PB) in a static magnetic field (B0) for aligning nuclear spins along a magnetization axis (z), said static magnetic field being substantially uniform over at least a volume of interest (VOI) of said body; (b) exposing said body, or at least said volume of interest, to a time-varying magnetic field gradient having components (Gx, Gy, Gz) directed along at least three non-coplanar directions (x, y, z) and to a transverse radio-frequency field (B1), whereby said time-varying magnetic field gradient defines a three-dimensional trajectory in k-space constituted by segments linking discrete points (kT1-kT9), and said transverse radio-frequency field deposits radio-frequency energy along at least part of said trajectory for flipping said nuclear spins by a same predetermined flip angle, independently from their position within said volume of interest.

Abstract: An imaging device including: plural pixels each including a photodetector; plural reading circuits associated with the plural photodetectors, each reading circuit including a first MOS transistor charging/discharging a photodetector and a second MOS transistor converting charges to be output by the photodetector into voltage; an electronic processing circuit configured to process the voltages outputted by the reading circuits; a first substrate on which are formed the pixels and the reading circuits, and a second substrate, distinct from the first substrate, on which is formed the electronic processing circuit, the second substrate being linked electrically to the first substrate by an electrical interconnection forming an electrical link between the reading circuits and the electronic processing circuit.